Comparison of volume gain AMPs

Здесь можно сравнить усилители по громкости с учетом подключенной нагрузки-наушников: плееров, смартфонов, звуковых карт, отдельных усилителей и прочих устройств.

В сравнении учавствуют только те устройства, у которых была определена мощность по эквивалентным классам качества .

To choose manufacturers

Acer
Apple
Astell&Kern
ASUS
Audinst
Audiolab
Audiotrak
Audirect
AuGlamour
Aune
Aureal
Behringer
Benjie
Beyerdynamic
Breeze Audio
Cary Audio
Cayin

CEntrance
Chord Electronics
Colorful
Cowon
Creative
DAART
Dared
Denon
DIY
E-MU
Ensoniq
Erzetich
EVGA
FiiO
Flang
Fly

Fostex
Gigabyte
GoVibe
Grado
Hidizs
HiFiMan
iBasso
IBM
iFi
Inakustik
KEF
Kennerton
KGUSS
Laconic
Leaf Audio
LeEco

Lenovo
Levz
LG
Lisk Audio
Lotoo
Luxury & Precision
McIntosh
Monster Audio
Musatoff
MUSE AUDIO
Musiland
MyST
New Bee
Nexum
Nu Force
Onkyo

ONN
OPPO
Oriolus
Pioneer
Pro-Ject
QLS
Questyle
RHA
RME
S-Audio Systems
Sabaj
Sansa
Schiit
Shanling
SMSL
Tecsun

theBit
Topping
Turtle Beach
Unison Research
Violectric
Walnut
Weiliang Audio
Westone
xDuoo
Xiaomi
Xuelin

Add amplifiers from selected manufacturers

No manufacturers selected

Choice of parameters

Equivalent power class ^F.A.Q.
Professional select: A AB B Max No Current Limit
User select: High-quality mode (A) The maximum values (No Current Limit)

Headphone impedance 1: ohm
Voltage for Headphone impedance 1: - dBV

Headphone impedance 2: ohm
Voltage for Headphone impedance 2: - dBV

Link to this page with the selected parameters

Brief information

Об управлении таблицы

При остуствии выбора производителей и продуктов отображаются все продукты.
При выборе только производителей отображаются продукты только выбранных производителей.
При выборе хотя бы одного продукта, будут отображаться лишь отдельные продукты, которые можно последовательно добавлять в таблицу сравнения.
Удаляются продукты через таблицу

Для продукта, отмеченного значком "меню"

на этой сранице отображается его меню с со ссылками на отчеты и сервисы.

Why is the "volume" expressed in dBV

When you compare amplifiers by loudness, the voltage value, expressed in dBV, should be used. The difference in voltage will show the difference in decibel (dB) between the amplifiers.

The power values in regular mW do not convenient to direct comparison.

The direct comparison by power is only suitable for speaker amplifiers operating with an ultra-low-ohm load. This does not apply to headphone amplifiers where the headphone resistance is higher than 8-16 ohms.

Because of the higher resistance of the headphones, when compare the volume of a musical signal it is necessary to simultaneously take into account the current and voltage limits. The speaker amplifier have limit by current. For the exact difference between the amplifiers in decibel, the power value must be converted into voltage in units of dBV, taking into account the margin by current for the music signal for every AMP.

What and how to compare with the characteristics provided by manufacturers

The value of the high quality mode power is equivalent to class A . Typically, manufacturers for this power indicate the percentage of distortion, which should be no more than 1%.

Simply <the Maximum power , this is the power level above, which the amplifier is already "wheezing" or the volume control is already at its maximum level. Usually indicated without a percentage of distortion, because high quality for this volume level is not implied.

Выходная мощность и сопротивление наушников

Так как мощность зависит от тока, напряжения и сопротивления усилителя, то для разных сопротивлений наушников будут лидировать разные усилители. По умолчанию предлагаются сопротивления 32 и 300 Ом. Можно задать любые другие значения.

Самый громкий - самый лучший?

Если выбрать излишне громкий усилитель, то можно столкнуться с проблемами фонового шума и/или несовершенства регулятора громкости.

Close ⊗

Information for Authors. You can freely use the graphics in your articles with a link to us. If there are difficulties with the interpretation of the graphs, you can ask questions on the feedback or facebook.

Compare for: Pure or equal class A Mod

		32 ohm		300 ohm
Menu	Name	dBV	mW	dBV	mW
	▲ ▼	▲ ▼		▲ ▼
	Acer Iconia Tab W500	-18.5	0.44	-11.9	2.01
	Apple A1749 Lightning Audio Adapter (iPhone 5s)	-15.2	0.95	0.0	31.26
	Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44	-8.5	4.38	-5.7	8.40
	Apple iPad mini	-32.5	0.02	-13.1	1.53
	Apple iPhone 5	-29.1	0.04	-9.6	3.39
	Apple iPhone 5S	-14.5	1.11	-3.9	12.81
	Apple Ipod 5.5 Gen	-37.7	0.01	-18.3	0.47
	Astell&Kern A&norma SR15 Balanced Out	-8.8	4.12	10.6	361.84
	Astell&Kern A&norma SR15 Single Out	1.4	43.08	5.7	116.58
	Astell&Kern AK240 Balanced	-20.0	0.31	-0.6	27.41
	Astell&Kern AK240 Unbalanced	-12.9	1.62	5.4	108.66
	Astell&Kern AK300 Balanced	-19.9	0.32	-0.4	28.26
	Astell&Kern AK300 Unbalanced	-11.8	2.04	5.7	115.77
	Astell&Kern AK320 Balanced	-21.2	0.24	-1.7	20.95
	Astell&Kern AK320 Unbalanced	-11.9	2.03	5.7	116.01
	Astell&Kern AK380 AMP Balanced Hi	-8.7	4.18	10.7	367.73
	Astell&Kern AK380 AMP Balanced Norm	-15.8	0.83	3.3	66.78
	Astell&Kern AK380 AMP Unbalanced Hi	-10.7	2.66	8.7	233.83
	Astell&Kern AK380 AMP Unbalanced Norm	-10.6	2.71	5.3	106.01
	Astell&Kern AK70 Balanced	-17.0	0.63	0.6	36.18
	Astell&Kern AK70 Unbalanced	-16.3	0.73	2.8	59.72
	Astell&Kern KANN Balanced	-11.2	2.36	8.2	207.38
	Astell&Kern KANN Unbalanced	-9.0	3.94	7.9	193.68
	ASUS Essence 3 Balanced	0.4	34.65	11.2	412.13
	ASUS Essence 3 Unbalance	1.4	43.05	13.4	688.25
	ASUS Essence One	-1.0	24.92	15.3	1058.43
	ASUS Essence ONE MKII Hi	3.6	71.48	13.3	675.35
	ASUS Essence ONE MKII Low	2.7	57.98	4.9	96.20
	ASUS Essence One MKII Muses Edition	2.8	60.12	11.6	454.50
	ASUS Essence One Mod V	-1.0	24.92	15.6	1122.24
	ASUS Essence One Muses Edition	-1.0	24.92	15.3	1058.37
	ASUS Impresario SBW-S1 PRO Xonar	-1.6	21.51	11.0	397.28
	ASUS K50IJ	-13.7	1.32	-2.1	19.10
	ASUS ROG Strix Fusion 700 USB EQ 0 Boost On	-16.2	0.75	-1.7	21.00
	ASUS ROG Xonar Phoebus	4.9	97.35	15.1	999.71
	ASUS STRIX RAID DLX Hi	9.2	259.96	15.0	997.24
	ASUS STRIX RAID DLX Low	1.6	45.06	3.7	73.84
	ASUS STRIX RAID DLX Mid	5.2	102.84	9.1	256.66
	ASUS STRIX RAID PRO Hi	3.2	65.23	12.9	616.23
	ASUS STRIX RAID PRO Low	-8.2	4.73	1.6	44.70
	ASUS Xonar Essence STX Hi	3.7	73.07	15.0	994.05
	ASUS Xonar Essence STX Low	-4.5	11.08	-2.1	19.27
	ASUS Xonar Essence STX Mid	2.8	59.95	9.9	305.01
	ASUS ZenFone Max Pro (M1) Neutron	-25.7	0.08	-10.7	2.64
	ASUS ZenFone Max Pro (M1) Poweramp 384	-26.1	0.08	-6.7	6.67
	Audinst HUD-DX1 Hi (Default Power)	7.2	163.41	14.3	832.33
	Audinst HUD-DX1 Hi (Robitron Power 12V 0.8A)	6.7	145.25	14.3	832.42
	Audinst HUD-DX1 Hi (USB Power)	2.0	49.91	2.5	55.63
	Audinst HUD-DX1 Low (Default Power)	3.0	62.62	14.3	832.75
	Audinst HUD-DX1 Low (Robitron Power 12V 0.8A)	3.1	64.42	14.3	831.58
	Audinst HUD-DX1 Low (USB Power)	1.8	47.38	2.3	52.77
	Audiolab M-DAC	-6.6	6.88	9.9	306.52
	Audiotrak Dr.Dac 2 OPA 627	0.2	32.75	17.6	1814.22
	Audiotrak Prodigy 7.1 Off	-16.4	0.72	1.7	46.29
	Audiotrak Prodigy 7.1 On	-7.5	5.50	11.9	483.64
	Audirect Beam 2 Balance	-11.3	2.34	3.5	70.63
	Audirect Beam 2 Single	-21.4	0.23	-2.1	19.26
	AuGlamour GR-1	6.2	131.33	7.9	194.03
	Aune B1s Class A+ Gain Hi	-1.7	21.33	12.2	517.93
	Aune B1s Class A+ Gain Low	-1.5	22.33	5.4	109.27
	Aune B1s Class A- Gain Hi	-8.4	4.56	11.1	400.85
	Aune T1 Low	-0.1	30.84	3.3	67.09
	Aune T1 Max	-2.3	18.47	15.8	1182.13
	Aune X1s	-5.7	8.39	13.7	737.09
	Aureal Vortex AU8830A2 BA88DL30A-01	-21.5	0.22	-2.1	19.27
	Behringer MicroAmp Ha400	-22.1	0.19	-2.7	16.92
	Behringer UB 502	-8.0	4.91	10.0	311.80
	Benjie K9	-23.5	0.14	-5.5	8.73
	Benjie S5	-27.2	0.06	-9.9	3.17
	Benjie X1	-21.0	0.25	-6.1	7.69
	Beyerdynamic IMPACTO essential	-18.9	0.41	-12.7	1.68
	Breeze Audio USB DAC-PD01	-30.0	0.03	-10.6	2.75
	Cary Audio HH-1	3.4	68.48	12.6	567.35
	Cayin HA-1AMK2 for 150-300 ohm	-4.7	10.64	6.1	127.59
	Cayin HA-1AMK2 for 30-60 ohm	2.6	57.09	10.0	314.26
	Cayin HA-1AMK2 for 60-150 ohm	1.6	45.66	11.4	428.68
	Cayin HA-1AMK2 for 600 ohm	-5.8	8.30	7.0	157.84
	Cayin HA-1AMK2 for 8-32 ohm	2.0	49.87	6.2	129.57
	Cayin i5	-13.1	1.54	1.5	44.48
	Cayin N3	-23.8	0.13	-4.4	11.45
	Cayin N5 Balanced	-6.5	7.02	2.8	59.63
	Cayin N5 MK2 Balance	0.8	37.41	0.9	38.23
	Cayin N5 MK2 Unbalance	-1.4	22.69	-1.2	23.49
	Cayin N5 Unbalanced	-4.5	11.19	-4.2	11.85
	Cayin N6	-4.0	12.41	2.0	49.93
	CEntrance DACPort HD	-11.1	2.43	2.8	58.99
	CEntrance Mini-M8	-21.4	0.23	-12.5	1.74
	Chord Electronics Hugo	-4.4	11.28	13.1	630.85
	Chord Electronics Hugo TT	9.0	250.89	11.1	406.69
	Chord Electronics Mojo	-12.0	1.98	7.5	173.95
	Colorful Colorfly C4 Pro Jack 3.5	-4.8	10.41	-4.5	11.19
	Colorful Colorfly C4 Pro Jack 6.3	0.6	36.18	0.9	38.59
	Colorful Colorfly CK4	-23.2	0.15	-5.7	8.42
	Cowon D2	-42.8	0.00	-23.3	0.15
	Cowon D2 Plus	-35.6	0.01	-16.1	0.76
	Cowon Plenue M2	-15.9	0.79	3.5	69.80
	Creative Audigy Fx	-20.4	0.29	-2.9	16.01
	Creative Sound Blaster E5	5.2	102.59	5.7	116.66
	Creative Sound Blaster Live! 5.1 (SB0600)	-3.5	13.87	5.4	108.47
	Creative Sound Blaster X7 LE Hi	10.3	335.08	14.6	909.01
	Creative Sound BlasterX AE-5 HP Out	8.9	243.02	14.4	866.24
	Creative Sound BlasterX AE-5 Line Out	-3.5	14.00	6.3	133.27
	Creative Sound BlasterX AE-9 High	0.6	36.08	15.0	982.02
	Creative Sound BlasterX AE-9 Iem	1.5	44.14	4.0	78.03
	Creative Sound BlasterX AE-9 Normal	0.9	38.37	10.0	312.08
	Creative SoundBlaster Zx	-15.2	0.95	4.3	83.69
	Creative SoundBlasterX G6 External power	-16.8	0.66	2.7	57.66
	Creative SoundBlasterX G6 Hi	-19.4	0.36	0.0	31.57
	Creative SoundBlasterX G6 Low	-24.1	0.12	-4.6	10.75
	Creative SXFI AMP Asus M1	0.5	34.79	7.3	167.69
	Creative SXFI AMP PC	3.0	62.00	7.3	167.72
	Creative X-Fi Elite Pro Front	-12.2	1.90	5.5	110.15
	Creative X-Fi Elite Pto Console (HP Out)	-12.3	1.84	-3.5	14.05
	Creative X-Fi Xtreme Gamer Fatal1ty Professional Series Creation Mode 44 kHz	-10.9	2.54	0.6	35.69
	DAART Aquila II Balance	17.9	1939.02	23.1	6346.38
	DAART Aquila II Unbalance	15.1	1021.16	17.5	1740.58
	DAART Canary II	10.6	361.96	16.8	1490.92
	Dared EF-99 Hi	-5.2	9.52	11.6	455.16
	Dared EF-99 Low	2.5	55.52	3.2	64.57
	Dared EF-99 Mid	-2.4	17.97	9.6	286.62
	Dared HPA-55L Balanced Out	-9.5	3.49	6.6	143.64
	Dared HPA-55L Single Out	-9.8	3.26	-5.6	8.60
	Denon DA-10 Hi	-18.5	0.44	0.9	38.72
	DIY 6N2-FU32 Out 1	0.2	32.86	1.1	39.92
	DIY 6N2-FU32 Out 2	-4.3	11.66	-3.5	14.02
	DIY Beta 22	12.6	566.22	12.6	571.91
	DIY HeadAMP lakkarius	16.8	1499.33	17.3	1688.42
	DIY Monster Zen	13.3	661.63	13.7	733.42
	E-MU 1616m	-10.4	2.86	9.0	251.08
	Ensoniq ES1370	-0.1	30.46	9.1	253.05
	Erzetich Bacillus Tilia	-3.0	15.55	15.6	1126.17
	Erzetich Perfidus	5.7	115.65	14.2	813.50
	EVGA Nu Audio	10.7	364.98	13.5	698.93
	FiiO A1	-33.0	0.02	-13.6	1.37
	FiiO Alpen E17	2.4	54.79	2.5	55.09
	FiiO E10K Olympus 2 Hi Bass Off	-22.8	0.17	-22.5	0.18
	FiiO E10K Olympus 2 Low Bass Off	-29.6	0.03	-29.3	0.04
	FiiO Fujiyama E06	-18.7	0.42	-10.0	3.15
	FiiO K5 Hi	-13.3	1.47	6.2	129.41
	FiiO K5 Low	5.1	100.92	5.1	101.37
	FiiO K5 Mid	3.8	75.68	12.4	543.28
	FiiO K5 Pro Hi	3.7	73.71	4.0	78.06
	FiiO K5 Pro Low	-3.4	14.36	-3.1	15.17
	FiiO K5 Pro Mid	0.0	31.36	0.3	33.15
	FiiO uBTR	-48.1	0.00	-28.6	0.04
	FiiO X1	-26.2	0.07	-6.8	6.52
	FiiO X1 MK2	-19.6	0.34	-0.1	30.24
	FiiO X3 II Hi	-10.6	2.71	4.0	78.24
	FiiO X3 II Low	-11.0	2.45	0.4	34.29
	FiiO X3 III Balanced Hi	-3.6	13.50	-3.4	14.25
	FiiO X3 III Balanced Low	-1.7	21.37	-1.4	22.56
	FiiO X3 III Unbalanced Hi	6.3	134.28	6.6	141.82
	FiiO X3 III Unbalanced Low	1.2	41.63	1.5	43.97
	FiiO X5	4.1	80.30	9.2	258.11
	FiiO X5 II Hi	-20.8	0.26	-1.3	22.91
	FiiO X5 II Low	-22.2	0.19	-2.7	16.69
	FiiO X5-III Balance	7.6	178.30	8.7	231.71
	FiiO X5-III Balanced Turbo	9.4	270.63	14.0	786.52
	FiiO X5-III Unbalance	3.5	70.60	3.8	74.63
	FiiO X7 AM1	5.1	100.29	5.1	101.08
	FiiO X7 AM2	-0.5	28.16	9.7	293.03
	FiiO X7 AM2 OLD FW	-10.0	3.10	4.7	93.10
	FiiO X7 II Balanced	1.8	47.58	12.9	615.51
	FiiO X7 II Unbalanced	6.6	144.28	6.9	154.75
	Flang V5 Hi	-19.0	0.40	0.5	34.92
	Flang V5 Low	-20.5	0.28	-1.0	24.65
	Fly FS504 Cirrus 2 PowerAmp (A5 v703)	-27.1	0.06	-16.1	0.77
	Gigabyte GA-A75-UD4H Realtek ALC889A	-25.9	0.08	-11.6	2.16
	GoVibe Porta Tube+ Mod C4 Op-Amp	3.9	76.33	3.9	76.47
	Grado RA-1	-15.1	0.97	4.3	84.99
	Hidizs AP100	-8.2	4.76	6.0	124.42
	Hidizs AP200	-1.9	20.37	2.9	60.68
	HiFiMan HM 802 Balanced Card Balanced Mode	-5.0	9.92	4.1	81.08
	HiFiMan HM 802 Balanced Card Normal Mode	-2.4	17.94	1.4	43.36
	HiFiMan HM 802 Gandi	-13.8	1.29	2.9	61.25
	HiFiMan HM 802 MiniBox	-7.8	5.16	6.8	150.97
	HiFiMan HM-601 MM4	5.9	122.62	6.2	130.38
	HiFiMan HM-603 Slim	-27.9	0.05	-8.4	4.49
	HiFiMan HM-700 Balance	-32.3	0.02	-12.8	1.63
	HiFiMan HM-801 Power Amp Board V2.0	-20.8	0.26	-1.3	23.05
	HiFiMan HM-801 Power Amp OCL-A 819-10571 (10 Ohm)	-20.2	0.30	-0.8	26.14
	HiFiMan HM-801 SM SYMMcard 7.2	11.3	420.13	11.8	477.49
	HiFiMan HM700 Single Out	-3.4	14.25	-2.9	15.84
	iBasso D-Zero	-26.8	0.07	-7.3	5.78
	iBasso D10 Cobra	-18.0	0.49	-17.8	0.52
	iBasso D14 Bushmaster	-2.3	18.39	8.2	207.28
	iBasso DC01	-22.2	0.19	-2.8	16.54
	iBasso DC03	5.5	111.49	6.0	124.01
	iBasso DX100	-22.0	0.20	-2.5	17.50
	iBasso DX150 AMP6 Balanced	9.8	301.48	12.4	546.54
	iBasso DX150 AMP6 Unbalanced	7.1	159.58	7.4	172.20
	iBasso DX160 Balance Hi	10.7	367.17	13.1	638.12
	iBasso DX160 Single Hi	8.0	196.28	8.1	201.32
	iBasso DX200 AMP1 Balanced	-2.7	16.84	-2.5	17.55
	iBasso DX200 AMP1 Unbalanced	-2.6	17.02	-2.5	17.41
	iBasso DX80	-3.6	13.68	7.4	172.70
	IBM ThinkPad X31	-45.3	0.00	-25.9	0.08
	iFi Micro iDSD Black Label Eco	6.6	142.47	6.6	143.69
	iFi Micro iDSD Black Label Mid	2.5	55.53	12.3	525.02
	iFi Micro iDSD Black Label Turbo	17.2	1622.50	19.0	2477.95
	Inakustik Premium Headphone Amp. No. 1 Out 1	-20.0	0.31	-0.5	27.60
	Inakustik Premium Headphone Amp. No. 1 Out 2	-20.1	0.30	-0.7	26.58
	KEF Bluetooth Receiver Motion One	8.2	204.96	8.5	223.66
	Kennerton Atlas EVGA Nu Audio	4.1	79.87	5.9	121.49
	Kennerton Atlas Internal DAC	0.1	31.83	1.9	48.81
	Kennerton Atlas Robitron	5.0	99.25	6.9	151.41
	Kennerton Ego	-7.8	5.18	2.4	53.76
	KGUSS DAC-K3	-5.3	9.20	-3.2	14.94
	Laconic Lunch BOX HA-06 PRO Hi	-11.7	2.11	7.7	185.25
	Laconic Lunch BOX HA-06 PRO Low	-9.2	3.73	6.3	133.65
	Leaf Audio CMD-22 V1.2.3 Gliese LT1361	-1.4	22.57	15.9	1215.84
	LeEco Cool changer s1	-96.9	0.00	-95.5	0.00
	Lenovo Edge E130	-9.8	3.28	-1.3	23.08
	Lenovo G770	-5.7	8.42	0.8	37.24
	Lenovo s820	-14.0	1.25	-13.4	1.43
	Levz HA-S-029	2.7	57.85	18.2	2063.85
	LG 24MP76	-11.0	2.47	-6.6	6.86
	LG G7 Hi-Fi Quad DAC Off, Hi impedance headphone connected (60-750 ohm)	-9.1	3.87	-5.2	9.54
	LG G7 Hi-Fi Quad DAC Off, Low impedance headphone connected (16-30 ohm)	-18.8	0.42	-9.3	3.65
	LG G7 Hi-Fi Quad DAC Off, without impedance headphone connected	-8.7	4.23	-2.2	18.76
	LG G7 Hi-Fi Quad DAC On, Hi impedance headphone connected (60-300 ohm)	-20.2	0.30	-0.7	26.35
	LG G7 Hi-Fi Quad DAC On, Low impedance headphone connected (16-30 ohm)	-14.9	1.02	-8.7	4.25
	LG G7 Hi-Fi Quad DAC On, without impedance headphone connected	-14.1	1.22	0.4	34.03
	Lisk Audio UX3-MOD3	3.2	65.72	11.9	479.16
	Lotoo PAW 5000 MKII Balance	-2.8	16.26	7.9	193.15
	Lotoo PAW 5000 MKII Single	-0.8	26.20	7.9	193.46
	Lotoo PAW 6000 Balance	8.0	195.82	9.7	294.84
	Lotoo PAW 6000 Single	5.2	102.40	5.3	105.30
	Lotoo Paw Gold	-8.1	4.88	6.9	153.69
	Lotoo PAW Pico	-25.8	0.08	-7.1	6.07
	Luxury & Precision L3 Balance DSD	-6.8	6.55	-4.7	10.65
	Luxury & Precision L3 DSD	-8.8	4.13	1.4	42.66
	Luxury & Precision L3 Pro Balanced DSD	-4.3	11.49	1.4	43.28
	Luxury & Precision L3 Pro Unbalance DSD	0.9	38.83	1.5	43.97
	Luxury & Precision L5 Pro	1.5	44.27	9.0	248.83
	Monster Audio MA-9 Alexmod Edition	6.9	153.34	7.0	155.95
	Musatoff HA-11 Hi	-1.5	22.27	17.1	1597.28
	Musatoff HA-11 Low	-0.6	27.43	6.5	141.14
	Musatoff HA-4	1.9	48.77	14.7	932.85
	Musatoff HA-5 Hi	-0.6	27.07	16.2	1299.89
	Musatoff HA-5 Low	0.3	33.51	6.6	141.30
	Musatoff HA-5SE	2.2	51.33	17.3	1673.19
	Musatoff HA-8 Hi	2.3	53.11	18.3	2094.87
	Musatoff HA-8 Low	0.2	32.88	6.5	141.08
	Musatoff HA-9 Hi	12.6	572.21	19.8	3010.71
	Musatoff HA-9 Low	7.8	186.75	7.8	188.99
	MUSE AUDIO TU-10	-15.7	0.85	-8.0	4.93
	Musiland Monitor 03 US	-3.9	12.75	-3.8	13.05
	MyST DAC 1866OCU V.2	16.8	1502.42	17.5	1777.13
	MyST DAC 2702 UAmp	-10.5	2.76	8.9	242.54
	MyST PortaDAC 1866OCUB v.3	6.3	133.82	8.4	215.69
	New Bee NB-1	-60.7	0.00	-60.0	0.00
	Nexum AQUA	-21.6	0.22	-3.0	15.49
	Nu Force Icon HD	9.3	266.20	12.2	515.58
	Nu Force uDAC	-27.5	0.06	-9.4	3.56
	Onkyo Granbeat DP-CMX1 Balanced	-14.6	1.08	4.8	94.94
	Onkyo Granbeat DP-CMX1 Unbalance	-14.4	1.14	5.1	100.30
	ONN X6	-33.7	0.01	-14.3	1.16
	OPPO HA-1 Balance	14.6	902.92	24.4	8706.41
	OPPO HA-1 Unbalance	10.6	362.65	16.7	1454.26
	OPPO HA-2	-0.0	31.20	7.5	176.26
	Oriolus DP100 Balance	-0.7	26.61	7.9	193.62
	Oriolus DP100 Unbalance	7.9	194.11	8.0	195.24
	Pioneer XDP-300R Balance	-10.2	3.00	9.3	263.54
	Pioneer XDP-300R Unbalance	-10.2	2.96	5.7	116.61
	Pro-Ject Head Box S2 Digital	-15.6	0.85	3.8	74.79
	Pro-Ject Pre Box S2 Digital	-14.1	1.21	5.3	106.39
	QLS QA350	-27.0	0.06	-7.6	5.43
	QLS Quloos QA390 Balance Super Hi - Hi	14.9	957.16	22.5	5578.18
	QLS Quloos QA390 Balance Super Hi - Low	-20.5	0.28	-1.1	24.21
	QLS Quloos QA390 Balance Super Hi - Mid	-7.9	5.10	11.6	448.23
	QLS Quloos QA390 Single Hi - Hi	8.5	221.03	18.1	2015.35
	QLS Quloos QA390 Single Hi - Low	-19.0	0.39	0.4	34.48
	QLS Quloos QA390 Single Super Hi - Hi	7.8	190.35	17.4	1730.51
	QLS Quloos QA390 Single Super Hi - Mid	-10.0	3.15	9.5	276.56
	Questyle QP1R H-Gain	-6.6	6.84	4.4	86.77
	RHA Bluetooth Cable (CL2 Planar)	-8.3	4.58	-8.1	4.88
	RME ADI-2 DAC FS 6.3 Hi	17.8	1879.98	19.3	2637.26
	RME ADI-2 DAC FS Iem	-3.8	13.00	-3.7	13.26
	S-Audio Systems Focus V2	11.6	449.08	11.6	454.32
	Sabaj D4	-4.5	11.19	11.3	425.27
	Sabaj HPA1 Jack 3.5	-7.1	6.06	5.4	109.10
	Sabaj PHA1 Jack 6.3	-7.8	5.22	8.0	198.04
	Sansa Clip+	-39.8	0.00	-20.4	0.28
	Schiit Fulla AMP	-18.2	0.48	-11.4	2.27
	Shanling M1	-23.6	0.14	-4.2	11.89
	Shanling M2	2.1	50.17	4.7	92.66
	Shanling M2s	2.4	54.85	5.1	101.29
	Shanling M3s Balance	6.0	125.24	8.2	207.78
	Shanling M3s Unbalance	5.2	102.34	5.2	103.72
	Shanling M5	-26.1	0.08	-6.6	6.77
	SMSL AD18	-23.2	0.15	-3.8	13.04
	SMSL ivy	-15.5	0.88	2.3	52.94
	SMSL M3	-23.1	0.15	-3.7	13.40
	SMSL sAp II	10.3	333.47	12.4	540.78
	SMSL sAp VI	-10.9	2.56	8.6	225.18
	SMSL sAp-9 Unbalance	-2.3	18.47	2.1	50.31
	SMSL SP200 Balance Hi	20.1	3177.55	20.1	3213.04
	SMSL SP200 Single Hi	19.2	2585.45	19.2	2605.90
	Tecsun HD-80	-21.0	0.25	-1.5	21.98
	theBit OPUS 2 Balance	-18.3	0.46	1.1	40.26
	theBit OPUS 2 Unbalance	-13.9	1.28	5.6	112.69
	Topping DX7 Pro Balance Hi	16.1	1277.03	20.8	3798.78
	Topping DX7 Pro Balance Low	13.1	640.26	15.1	1015.62
	Topping DX7 Pro Unbalance Hi	13.0	624.05	15.3	1067.11
	Topping DX7 Pro Unbalance Low	8.2	207.12	9.2	262.40
	Topping NX4	-7.5	5.52	11.9	485.44
	Turtle Beach Santa Cruz	-25.1	0.10	-5.6	8.59
	Unison Research SH For Hi	-8.0	4.97	-7.8	5.14
	Unison Research SH For Low	-8.6	4.32	1.4	42.65
	Unison Research SH For Low - Line in	-13.9	1.26	-13.6	1.38
	Violectric HPA V100	-31.5	0.02	-12.0	1.95
	Violectric HPA V200	15.6	1125.86	24.4	8660.82
	Violectric HPA V220	16.5	1405.45	21.8	4767.07
	Violectric HPA V281 Balance	9.6	282.85	29.0	24859.51
	Violectric HPA V281 Unbalance	17.2	1648.73	24.5	8712.69
	Violectric HPA V90	11.4	428.37	25.9	12082.00
	Walnut V3 Balance	-8.9	4.07	10.6	357.78
	Walnut V3 Unbalance	-19.1	0.39	0.4	34.12
	Weiliang Audio U9	-3.2	14.92	13.6	717.53
	Westone Bluetooth Cable V1 WBTV1	-16.5	0.69	-9.0	3.89
	Westone Bluetooth Cable V2 WBTV2	-12.4	1.82	-12.2	1.87
	xDuoo D3 nano	-16.2	0.76	3.0	62.72
	xDuoo TA-01	-10.9	2.53	8.5	222.38
	xDuoo TA-02	-7.8	5.22	9.5	278.60
	xDuoo x10 Hi	-2.0	19.66	8.4	216.05
	xDuoo x10 Low	2.3	52.66	4.4	85.41
	xDuoo X2	-6.8	6.59	-5.6	8.69
	xDuoo X20 Balance	10.0	314.17	10.3	332.63
	xDuoo X20 Unbalance	4.3	83.90	4.3	84.47
	xDuoo X3 Default	-2.3	18.41	-2.3	18.52
	xDuoo X3 Rockbox	1.0	39.72	1.1	39.96
	xDuoo XD-05 Default	-17.8	0.51	1.6	45.11
	xDuoo XD-05 Plus hi Boost Off	-12.4	1.80	3.1	63.78
	xDuoo XD-05 Plus Hi Boost On	-11.4	2.26	3.3	66.39
	xDuoo XD-05 Plus Low Boost Off	-13.6	1.35	-2.1	19.34
	xDuoo XD-05 Plus Low Boost On	-10.2	2.96	-8.1	4.86
	xDuoo XD-05 Plus Mid Boost Off	-12.4	1.80	3.1	63.79
	xDuoo XD-05 Plus Mid Boost On	-12.6	1.72	-2.9	16.03
	xDuoo XD-05 Sanmigel Mod	-8.9	4.05	10.6	355.84
	xDuoo XP-2 Hi	-5.9	8.07	4.6	90.58
	xDuoo XP-2 Low	-11.0	2.46	-6.4	7.20
	xDuoo XQ-10	-12.9	1.58	-0.4	28.81
	Xiaomi Mi 9T Pro Neutron 44	-10.7	2.65	-6.7	6.67
	Xiaomi Mi A1 Neutron	-20.5	0.28	-1.0	24.74
	Xiaomi Mi A1 VLC OpenSL ES	-93.2	0.00	-84.2	0.00
	Xiaomi Redmi Note 4	-5.6	8.61	-2.4	18.13
	Xiaomi Redmi Note 4X Android 6 24 bit	-89.1	0.00	-88.9	0.00
	Xiaomi Redmi Note 4X PowerAmp	-20.7	0.26	-4.8	10.42
	Xiaomi Redmi Note 4X VLC OpenES	-90.4	0.00	-90.2	0.00
	Xuelin iHiFi 100	-13.6	1.36	-11.4	2.25
	Xuelin iHiFi 770 Out 1	-35.6	0.01	-16.1	0.76
	Xuelin iHiFi 770 Out 2	-35.4	0.01	-16.0	0.79
	Xuelin iHiFi 770C Bright	-31.7	0.02	-12.3	1.84
	Xuelin iHiFi 770C Default	-29.2	0.04	-9.8	3.27
	Xuelin iHiFi 780 Out 1	-30.7	0.03	-11.3	2.34
	Xuelin iHiFi 780 Out 2	-33.8	0.01	-14.3	1.16
	Xuelin iHiFi 800	-31.2	0.02	-11.7	2.10
	Xuelin iHiFi 812 V2	7.2	163.29	9.3	266.97
	Xuelin iHiFi 960 Pro	1.8	47.59	4.0	77.88

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Voltage and Sensitivity
Comparison of basic characteristics AMPs
Comparison of the optimal range of volume control

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Comparison of volume gain AMPs

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